Hambergite

Refractive Index: 1.5888–1.5890
Abbe Number: 68.7–71.0
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 3

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.5890

V_{D}

= 68.7

n^{2} = 1 + \frac{λ ^{2}}{0.6734 ( λ ^{2} - 0.009059 )}

Fit #2— Specimen fit

Shannon / Cauchy

$n$

n

= 1.5889

V_{D}

= 69.8

n^{2} = 1 + \frac{λ ^{2}}{0.6732 ( λ ^{2} - 0.008913 )}

Fit #3— Specimen fit

Shannon / Cauchy

$n$

n

= 1.5888

V_{D}

= 71.0

n^{2} = 1 + \frac{λ ^{2}}{0.6731 ( λ ^{2} - 0.008765 )}

Absorption Specimens

Madagascar, Antananarivo Province (Vakinankaratra District), Ambohimanambola (Anjanabonoina Mine)

Madagascar, Antananarivo Province (Vakinankaratra District), Ambohimanambola (Anjanabonoina Mine)

Madagascar, Antananarivo Province (Vakinankaratra District), Ambohimanambola (Anjanabonoina Mine)

Nepal, Eastern Region (Mechi Zone), Taplejung